Homopolar Motor With Five Speed Manual Stick-Shift





Introduction: Homopolar Motor With Five Speed Manual Stick-Shift

This video show how to build a homopolar motor that's really different...it's got a five-speed shifter!

The homopolar motor is the simplest design electrical motor in the world. It uses a battery, a neodymium magnet and a wire. Usually, either the copper wire or the magnet rotates. In this case the battery rotates.

Here, I've used a battery, a neo magnet, and a copper wire wrapped around a coat-hanger. The coat-hanger acts as both electrical connection and support for the hanging battery. Coins are used to change speeds of the rotating "battery-plus-change" motor.

I've been recently told that US coins, being non-magnetic, won't work for this Instructable. (Sorry about that!) Perhaps the US coins could be glued together to make it work. Furthermore, some Canadian pennies are magnetic and some are not.

You can order the BEST neodymium super-magnets from K&J Magnetics here.

See more of my homopolar motor videos at :



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    Which specific magnet did you use for this motor? I'd like to know exactly which one before I order it for my Grade 6 science class. Is it axially or diametrically magnetized? Thanks

    penny, nickel, dime, dollar, 2 dollar

    which Canadian coins did you use like in money wise

    Check my other comments about this in the main page. The comments here are jumbled with the timing.

    Im also useing diff size washers bcuz we dont have the coins avalb .. With a 18g copper wire ...??? Help

    Have you been able to suspend the battery ok? Can you make the battery spin by using a jumper wire from +terminal of battery to the magnet?

    Ive done the jumper cable u suggested and it worked but thats not gonna change the gears??

    Ok i was able to do a jumper cable like u said but that still not helping in changeing the gears in diff speeds just runs off the batt if i do the jumper thing??

    No i have not ? i did your one idea of sanding down the hanger and nothing .. Its not working .. I also did the magnet with just the battery and nothing .. I couldnt find the 1/2 inch thick kind of Neodymium magnet so i got what was alvb the 7 in (18mm by 3mm) battery that comes with three in a pack so im trying the three together so far it will only spin with the copper touching the batt.. ?? Am i still not doing anythhing rt .. And also not useing coins i am useing the washers in diff sz. But makeing it in similar sz of the coins u used in the video???